Refactoring HOS folder structure (#771)

* Refactoring HOS folder structure

Refactoring HOS folder structure:

- Added some subfolders when needed (Following structure decided in private).
- Added some `Types` folders when needed.
- Little cleanup here and there.
- Add services placeholders for every HOS services (close #766 and #753).

* Remove Types namespaces

Ryujinx.HLE/HOS/Services/Pctl/ParentalControlServiceFactory/IParentalControlService.cs

@@ -0,0 +1,41 @@
+using Ryujinx.Common.Logging;
+
+namespace Ryujinx.HLE.HOS.Services.Pctl.ParentalControlServiceFactory
+{
+    class IParentalControlService : IpcService
+    {
+        private bool _initialized = false;
+
+        private bool _needInitialize;
+
+        public IParentalControlService(bool needInitialize = true)
+        {
+            _needInitialize = needInitialize;
+        }
+
+        [Command(1)] // 4.0.0+
+        // Initialize()
+        public ResultCode Initialize(ServiceCtx context)
+        {
+            if (_needInitialize && !_initialized)
+            {
+                _initialized = true;
+            }
+            else
+            {
+                Logger.PrintWarning(LogClass.ServicePctl, "Service is already initialized!");
+            }
+
+            return ResultCode.Success;
+        }
+
+        [Command(1001)]
+        // CheckFreeCommunicationPermission()
+        public ResultCode CheckFreeCommunicationPermission(ServiceCtx context)
+        {
+            Logger.PrintStub(LogClass.ServicePctl);
+
+            return ResultCode.Success;
+        }
+    }
+}